View Compilation Error

0_0_34522493_16474.c:3:1: error: unknown type name 'using'
 using namespace std;
 ^
0_0_34522493_16474.c:3:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std'
 using namespace std;
                 ^
0_0_34522493_16474.c: In function 'main':
0_0_34522493_16474.c:16:1: error: expected expression before '/' token
 //  for(int i=0;i<4;i++)
 ^
0_0_34522493_16474.c:22:1: error: expected expression before '/' token
 //  cout<<count(a,b,1)*count(c,d,2018)<<endl<<count(a,b,2)*(count(c,d,1009)-count(c,d,2018))<<endl<<count(c,d,1)*count(a,b,2018)<<
 ^